Improved fan-blower



UNITED STATES PATENT OFFICE.

J. F. LEITOH, OF GREENE, NEW YORK, ASSIGNOR TO ORRIN D. CARTER.

IMPROVED FAN-BLOWER.

Specification forming part of Letters Patent No. 34,028, dated December24, 1861.

To all whmn it may concern:

Be it known that I, J. F. LEITCH, of the town of Greene, in the countyof Ohenango, State of New York, have invented a new and usefulImprovement in Fan-Blowers for Furnaces, Forges, Blacksmith-Fires, orany place where a constant and steady current of wind is desired; andthe following is a clear, full, and exact description of the same,reference being had to the accompanying drawings, making a part of thisspecification.

Figure 1 shows a top View or section cut through at the center offan-room. Fig. 2 is a side elevation, having one plate removed, showingthe internal arrangements.

My invention consists in the peculiar con- 7 struction of andcombination of the circumscribed fan-room, scroll air chamber andpassage, and wind cut-off. v

To enable others skilled in the art to make and use my invention,Iwilldescribe it in detail, referring to the drawings and to the let.- tersmarked thereon.

In constructing my improved tan-blower for furnaces, forges,blacksmith-fires, or any places where a constant and steady current ofair is desired,the case may be made of cast metal by having the two sidepatterns furnished with the rim and flange to match and come together soas to form the circular fanroom, scroll air-passage, and wind cutoff; orthey may be made of sheet or boileriron, the flange to form thecircumscribed fan-room and outside caseto the scroll being bent in theproper shape, and may be riveted or bolted onto the sides and securedtogether, or the case can be constructed in part or entirely of wood. A

The sides A A are to be flat surfaces and placed parallel to each other,between which the outer rim of the case B is secured in such manner asto form an air-tight joint. Therim B may be of any desirable width, togive ca pacity to the amount of wind rcq uired; but it is not desirablethat the space in the scrollchamber should be wider than to form asquare of the size of the conductor D or pipe to convey'the current ofwind from the blower. The fan-room E is made ina circle by having a rimor flange a a secured to the sides A A "and extending toward each other,so that they fill about three-fourths of the space between the sides AA,thus forming a partition between the fan-room E and the scrollairpassage 0, with the exception of a narrow opening or slit 1) b in thecenter, which extends around the entire fan-room E, it only being closedat one point and formingawind cut-off 6 directly at or where the scrollcommences, thereby preventing any current of wind from being carriedaround by the wings ffff of the revolving fanF. The wings ff f f aremade square or oblong, are slightly curved or bent forward, and shouldnearly fill all of the space in the circumscribed fan-room E beyond theholes or openings 0 c in the sides A A, which are for the ingress of theair to the blower.

The fan F may be operated by a band or belt on the driving drum orpulley G on the shaft h in the ordinary manner.

The advantages and peculiarities of my invention are that it does notrequire more than one-fourth the power to run it to raise the same J.1?. LEITUII.

\Vitnesses:

R. MACDONALD, I. II. Boron.

